Sounds like mouth fungus. Horrible at treatment names, but you need to treat it quick before it gets too bad or the fish will die b/c of innability to eat (If I remember correctly, you need Grain A tx to get rid of the fungus- starts with an M???).
Someone should post soon with the name of the tx you need to buy. LPS should lead you in the right direction. Ich meds won't work if it is mouth fungus- ich is a parasite.